From 8f396ffb61f5f2ee0efec072e93f9003800c8be3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Aubrey/=E3=82=AA=E3=83=BC=E3=83=96=E3=83=AA=E3=83=BC?=
 <44238627+aubymori@users.noreply.github.com>
Date: Sat, 4 Nov 2023 20:45:37 -0500
Subject: [PATCH] Explorer 32px Icons 1.0.0 (#356)

* Explorer 32px Icons 1.0.0

* Explorer 32px Icons: Only compile on 1.4 and greater
---
 mods/explorer-32px-icons.wh.cpp | 158 ++++++++++++++++++++++++++++++++
 1 file changed, 158 insertions(+)
 create mode 100644 mods/explorer-32px-icons.wh.cpp

diff --git a/mods/explorer-32px-icons.wh.cpp b/mods/explorer-32px-icons.wh.cpp
new file mode 100644
index 000000000..378cf6e0e
--- /dev/null
+++ b/mods/explorer-32px-icons.wh.cpp
@@ -0,0 +1,158 @@
+// ==WindhawkMod==
+// @id              explorer-32px-icons
+// @name            Explorer 32px Icons
+// @description     Makes the "Medium icons" view in Explorer 32px again
+// @version         1.0.0
+// @author          aubymori
+// @github          https://github.com/aubymori
+// @include         *
+// ==/WindhawkMod==
+
+// ==WindhawkModReadme==
+/*
+# Explorer 32px Icons
+Beginning with Windows Vista, the "Medium icons" view (previous just "Icons") uses
+icons that are 48 pixels in size, instead of the previous 32 pixel size. This mod
+restores the 32 pixel size.
+
+**This mod will only work on Windhawk v1.4 and greater.**
+
+# IMPORTANT
+You **must** be using Explorer with the SysListView32 view enabled for this mod to work.
+The default DirectUI view will not work.
+
+**Before**:
+
+![Before](https://raw.githubusercontent.com/aubymori/images/main/explorer-32px-icons-before.png)
+
+**After**:
+
+![After](https://raw.githubusercontent.com/aubymori/images/main/explorer-32px-icons-after.png)
+
+*/
+// ==/WindhawkModReadme==
+
+#include <windhawk_utils.h>
+
+/* FOLDERVIEWMODE enum */
+#include <shobjidl.h>
+
+/* All of these symbols use the same calling convention,
+   but it varies between x86 and x86-64 */
+#ifdef _WIN64
+#define CALCON __cdecl
+#define SCALCON L"__cdecl"
+#else
+#define CALCON __thiscall
+#define SCALCON L"__thiscall"
+#endif
+
+/* Makes "Medium icons" set 32px icons. */
+typedef void (* CALCON CDefView__SwitchToViewModeAndIconSize_t)(void *, FOLDERVIEWMODE, int);
+CDefView__SwitchToViewModeAndIconSize_t CDefView__SwitchToViewModeAndIconSize_orig;
+void CALCON CDefView__SwitchToViewModeAndIconSize_hook(
+    void           *pThis,
+    FOLDERVIEWMODE  mode,
+    int             size
+)
+{
+    if (mode == FVM_THUMBNAIL && size == 48)
+    {
+        size = 32;
+    }
+
+    return CDefView__SwitchToViewModeAndIconSize_orig(
+        pThis, mode, size
+    );
+}
+
+/* Make 32px icons display labels below. */
+typedef void (* CALCON CListViewHost__SwitchToViewModeAndIconSizeWorker_t)(void *, FOLDERVIEWMODE, FOLDERVIEWMODE, UINT);
+CListViewHost__SwitchToViewModeAndIconSizeWorker_t CListViewHost__SwitchToViewModeAndIconSizeWorker_orig;
+void CALCON CListViewHost__SwitchToViewModeAndIconSizeWorker_hook(
+    void           *pThis,
+    FOLDERVIEWMODE  prevMode,
+    FOLDERVIEWMODE  newMode,
+    UINT            size
+)
+{
+    if (newMode == FVM_SMALLICON && size == 32)
+    {
+        newMode = FVM_ICON;
+    }
+
+    return CListViewHost__SwitchToViewModeAndIconSizeWorker_orig(
+        pThis, prevMode, newMode, size
+    );
+}
+
+/* Make "Medium icons" selected when icons are 32px */
+typedef UINT (*CALCON CDefView_GetMenuIDFromViewModeAndIconSize_t)(void *, FOLDERVIEWMODE, UINT, int);
+CDefView_GetMenuIDFromViewModeAndIconSize_t CDefView_GetMenuIDFromViewModeAndIconSize_orig;
+UINT CALCON CDefView_GetMenuIDFromViewModeAndIconSize_hook(
+    void           *pThis,
+    FOLDERVIEWMODE  mode,
+    UINT            size,
+    int             i1
+)
+{
+    if (mode == FVM_SMALLICON && size == 32)
+    {
+        return 28750;
+    }
+
+    return CDefView_GetMenuIDFromViewModeAndIconSize_orig(
+        pThis, mode, size, i1
+    );
+}
+
+BOOL Wh_ModInit(void)
+{
+    HMODULE hShell32 = LoadLibraryW(L"shell32.dll");
+    if (!hShell32)
+    {
+        Wh_Log(L"Failed to load shell32.dll");
+        return FALSE;
+    }
+
+    WindhawkUtils::SYMBOL_HOOK hooks[] = {
+        {
+            {
+                L"private: void "
+                SCALCON
+                L" CDefView::_SwitchToViewModeAndIconSize(enum FOLDERVIEWMODE,int)"
+            },
+            &CDefView__SwitchToViewModeAndIconSize_orig,
+            CDefView__SwitchToViewModeAndIconSize_hook,
+            false
+        },
+        {
+            {
+                L"private: void "
+                SCALCON
+                L" CListViewHost::_SwitchToViewModeAndIconSizeWorker(enum FOLDERVIEWMODE,enum FOLDERVIEWMODE,unsigned int)"
+            },
+            &CListViewHost__SwitchToViewModeAndIconSizeWorker_orig,
+            CListViewHost__SwitchToViewModeAndIconSizeWorker_hook,
+            false
+        },
+        {
+            {
+                L"private: unsigned int "
+                SCALCON
+                L" CDefView::GetMenuIDFromViewModeAndIconSize(unsigned int,unsigned int,int)"
+            },
+            &CDefView_GetMenuIDFromViewModeAndIconSize_orig,
+            CDefView_GetMenuIDFromViewModeAndIconSize_hook,
+            false
+        }
+    };
+
+    if (!HookSymbols(hShell32, hooks, ARRAYSIZE(hooks)))
+    {
+        Wh_Log(L"Failed to hook one or more symbol functions");
+        return FALSE;
+    }
+
+    return TRUE;
+}
\ No newline at end of file